Edmundston, New Brunswick climate data is summarized below. Average annual temperatures range from -1 °C (low) to 9.3 °C (high). Annual precipitation averages 676 Millimeters. Edmundston is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -16.34 °C | -6.64 °C | 0 mm |
| February | -15.11 °C | -5.16 °C | 0 mm |
| March | -10.8 °C | 0.19 °C | 0 mm |
| April | -2.36 °C | 7.59 °C | 40 mm |
| May | 4.41 °C | 16.38 °C | 70 mm |
| June | 9.53 °C | 21.04 °C | 108 mm |
| July | 12.89 °C | 24.22 °C | 135 mm |
| August | 12.13 °C | 23.65 °C | 106 mm |
| September | 7.09 °C | 18.79 °C | 85 mm |
| October | 1.94 °C | 11.23 °C | 72 mm |
| November | -3.3 °C | 4.1 °C | 57 mm |
| December | -11.43 °C | -3.56 °C | 3 mm |
| Annual | -1 °C | 9.3 °C | 676 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Normal |